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Imonautilus

Cephalopoda - Nautilida - Epistroboceratidae

Taxonomy
Imonautilus was named by Niko and Mapes (2007). Its type is Imonautilus meeki.

It was assigned to Trigonoceratidae by Niko and Mapes (2007); and to Epistroboceratidae by Korn (2025).

Species
I. meeki (type species)

Synonymy list
YearName and author
2007Imonautilus Niko and Mapes pp. 299 – 300
2025Imonautilus Korn p. 33

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
RankNameAuthor
classCephalopodaCuvier 1797
subclassNautilia(Wade 1988)
orderNautilidaAgassiz 1847
suborderDomatoceratina
superfamilySubclymenioideaShimansky 1962
familyEpistroboceratidae
genusImonautilus

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

G. †Imonautilus Niko and Mapes 2007
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†Imonautilus meeki Niko and Mapes 2007
Diagnosis
ReferenceDiagnosis
S. Niko and R. H. Mapes 2007Coiled genus of trigonoceratids, evolute without strong compression; juvenile shell Stroboceras-like with shallow ventral groove, but ventral groove becomes reduced at or near maturity on the roundly inflated venter; ventrolateral and lateral grooves and ventral ridges strong in juvenile conch, but become obsolescent or subdued with maturity; profiles of adoral whorls are subsemicircular to depressed suboval, with width/height ratios attaining 1.11; umbilical angle well defined in adoral whorls; dorsal (contact) groove shallow and narrow; adoral growth lines are not accentuated as in Stroboceras; sutures with shallow lateral lobes; siphuncle subcentral.
Measurements
No measurements are available
Composition: aragoniteo
Environment: marinec
Locomotion: actively mobileo
Life habit: nektobenthico
Diet: carnivoreo
Vision: well-developedc
Created: 2005-01-28 02:35:00
Modified: 2009-09-27 12:10:42
Source: o = order, c = class
References: Kiessling 2003, Kiessling 2004

Age range: Serpukhovian or 330.30000 to 323.40000 Ma

Collections (2 total)


Time interval Ma Country or state Original ID and collection number
Serpukhovian330.3 - 323.4USA (Arkansas) I. meeki (5517 69282)